Alter Memory allow me to see Their memories?


While this charm lasts, you can affect the target’s memory of an event that it experienced within the last 24 hours and that lasted no more than 10 minutes. You can permanently eliminate all memory of the event, allow the target to recall the event with perfect clarity and exacting detail, change its memory of the details of the event, or create a memory of some other event.

I have an issue with the wording it implies that I have to know what the event was to alter it. What I am asking is can you use Alter Memory to basically see the event for yourself?

64 byte cache block and memory overhead for cachline with 7 states (3 bits)

I came across some lecture notes of a professor about memory consistency and models. There is an example about memory overhead:

The cache line has 7 states (3 bits): unowned, shared, exclusive, modified, read, update and “uncached read”.

  • For 64 processor with the cache line described above, the memory overhead is 12.5%
  • For 256 processor with the cache line described above, the memory overhead is 50%
  • For 1024 processor with the cache line described above, the memory overhead is 200%.

This is the only information that I received from the notes. I wanted to ask him by contacting him but I got no answer. How are these overheads calculated?

Computer Architecture, Cache Memory question

A computer system has the following characteristics. The main memory has 1000 blocks. One block contains 8 words. Cache memory has 32 words. a)What is the format of the address? b)A program passes 4 times through the locations 7 to 37 decimally. What is the hit rate? And how does the cache look after the 4 passings. The system uses direct mapping.

I know that there are 1000 * 8 = 2^10 * 2^3 = 15 bits for the address. Other than that I am stuck.

Thanks!

Why do memory dump sizes on some machines not correlate with the amount of RAM?

I’m using winpmem to do some memory dumps. I did a test run on my workstation and the files was about 32GB, exactly what I expected since I have 32 gigs of RAM. However, on other machines the output file (aaf4 format) is much larger. It does not seem to correlate to RAM + Pagefile either. What determines this file size? Some of these are VMs, if it matters.

Protect sensitive data in memory

Is there a way to protect sensitive data which is in RAM? Our setup is a microcontroller with no hardware support for security. When there is a need to encrypt data, then the secret key exists in RAM. Even further- plain text exists in RAM. So if anyone can have an access to RAM (e.g. jtag), then the sensitive data is in danger?

Large Memory Cache Issues

Hello linuxers,

I'm running a CentOS server (specs below) with 32 GB memory. My problem is 18.49 GB of the 32GB is used by cache. That seems to be a lot. Is that a good thing or cache is using too much? I'm running a cryptocurrency website. I cache a lot of stuff because I'm using API to pull cryptocurrency prices like the ones on this page: https://www.cryptozink.io/live-cryptocurrency-coins-prices/.

Is cache keeping the site from running out of memory or it's using too much and I should…

Large Memory Cache Issues

Does Modify Memory stack?

In the DMG, multiple non-damage effects from a source with the same name do not stack (for example, a character with Bless cast on it multiple times only gains the benefit once).

Would this also be true for Modify Memory? If a creature has Modify Memory cast on it to alter one memory, and then cast on it again to alter a different memory, will only one casting take hold, and which one (assuming they’re cast at the same level)?

DFA question regarding memory and states

I have to program a DFA which has to do the following for an input of binary 5 my task told me to use a finite memory

0 0 1 1 2 3 2 4 0 3 1 2 4 3 4 

qi−1 δ(qi−1,0) δ(qi−1,1) these are the rows

Where i have the transition function If input is 1 then

q= (2*q)+1 % n (and i guess this is one memory)

otherwise if input is 0 then

q = 2q % n (also memory phase)

Now i came to the fourth row there the struggle starts I have no more input

Now, can i “memorize” each read symbol and a counter So if i reach an end i could test of my memorized binary number minus my counter is not zero and if it is no zero i will continue with the value?

Otherwise it reached it’s final state Is this legit?

I have a limit of states that should be m mod n